A double-free was found in the way 389-ds-base handles virtual attributes context in persistent searches. An attacker could send a series of search requests, forcing the server to behave unexpectedly, and crash.

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available.

  - A double-free was found in the way 389-ds-base handles virtual attributes context in persistent searches.
    An attacker could send a series of search requests, forcing the server to behave unexpectedly, and crash.
    (CVE-2021-4091)

Note that Nessus relies on the presence of the package as reported by the vendor.

The remote Alibaba Cloud Linux 3 host has packages installed that are affected by a vulnerability as referenced in the ALINUX3-SA-2022:0020 advisory.

    Package updates are available for Alibaba Cloud Linux 3 that fix the following vulnerabilities:

    CVE-2021-4091:
    A double-free was found in the way 389-ds-base handles virtual attributes context in persistent searches.
    An attacker could send a series of search requests, forcing the server to behave unexpectedly, and crash.

Tenable has extracted the preceding description block directly from the Alibaba Cloud Linux security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

The remote Debian 11 host has packages installed that are affected by multiple vulnerabilities as referenced in the dla-4021 advisory.

    - -------------------------------------------------------------------------     Debian LTS Advisory DLA-4021-1                debian-lts@lists.debian.org     https://www.debian.org/lts/security/                       Andrej Shadura     January 19, 2025                              https://wiki.debian.org/LTS
    - -------------------------------------------------------------------------

    Package        : 389-ds-base     Version        : 1.4.4.11-2+deb11u1     CVE ID         : CVE-2021-3652 CVE-2021-4091 CVE-2022-0918 CVE-2022-0996                      CVE-2022-2850 CVE-2024-2199 CVE-2024-3657 CVE-2024-5953                      CVE-2024-8445

    This update fixes multiple vulnerabilities in 389-ds-base LDAP server.

    CVE-2021-3652

        If an asterisk is imported as password hashes, either accidentally         or maliciously, then instead of being inactive, any password will         successfully match during authentication. This flaw allows an attacker         to successfully authenticate as a user whose password was disabled.

    CVE-2021-4091

        A double-free was found in the way 389-ds-base handles virtual         attributes context in persistent searches. An attacker could send a         series of search requests, forcing the server to behave unexpectedly,         and crash.

    CVE-2022-0918

        A vulnerability allows an unauthenticated attacker with network         access to the LDAP port to cause a denial of service. The denial of         service is triggered by a single message sent over a TCP connection,         no bind or other authentication is required. The message triggers         a segmentation fault that results in slapd crashing.

    CVE-2022-0996

        A vulnerability allows expired passwords to access the database to         cause improper authentication.

    CVE-2022-2850

        When the content synchronization plugin is enabled, an authenticated         user can reach a NULL pointer dereference using a specially         crafted query. This flaw allows an authenticated attacker to cause         a denial of service. This CVE is assigned against an incomplete fix         of CVE-2021-3514.

    CVE-2024-2199

        A denial of service vulnerability that may allow an authenticated         user to cause a server crash while modifying `userPassword` using         malformed input.

    CVE-2024-3657

        A specially-crafted LDAP query can potentially cause a failure on         the directory server, leading to a denial of service.

    CVE-2024-5953

        This issue may allow an authenticated user to cause a server denial         of service while attempting to log in with a user with a malformed         hash in their password.

    CVE-2024-8445

        The fix for CVE-2024-2199 in 389-ds-base was insufficient to cover         all scenarios. In certain product versions, an authenticated user         may cause a server crash while modifying `userPassword` using         malformed input.

    For Debian 11 bullseye, these problems have been fixed in version     1.4.4.11-2+deb11u1.

    We recommend that you upgrade your 389-ds-base packages.

    For the detailed security status of 389-ds-base please refer to     its security tracker page at:
    https://security-tracker.debian.org/tracker/389-ds-base

    Further information about Debian LTS security advisories, how to apply     these updates to your system and frequently asked questions can be     found at: https://wiki.debian.org/LTS

Tenable has extracted the preceding description block directly from the Debian security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote Redhat Enterprise Linux 8 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2022:0952 advisory.

    Red Hat Directory Server is an LDAPv3-compliant directory server. The suite of     packages includes the Lightweight Directory Access Protocol (LDAP) server, as     well as command-line utilities and Web UI packages for server administration.

    Security Fix(es):

    * 389-ds-base: sync_repl NULL pointer dereference in sync_create_state_control() (CVE-2021-3514)

    * 389-ds-base: double-free of the virtual attribute context in persistent search (CVE-2021-4091)

    For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and     other related information, refer to the CVE page(s) listed in the References section.

    Bug Fix(es):

    * ACIs are being evaluated against the Replication Manager account in a replication context. (BZ#2022086)

    * A connection can be erroneously flagged as replication conn during evaluation of an aci with ip bind     rule (BZ#2022090)

    * DB corruption _entryrdn_insert_key - Same DN (dn: nsuniqueid=ffffffff-ffffffff-ffffffff-     ffffffff,<SUFFIX>) is already in the entryrdn file (BZ#2022686)

    * CLI needs option to set nsslapd-state (BZ#2040794)

    Users of Red Hat Directory Server 11 are advised to install these updated     packages.

Tenable has extracted the preceding description block directly from the Red Hat Enterprise Linux security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote Rocky Linux 8 host has packages installed that are affected by a vulnerability as referenced in the RLSA-2022:0889 advisory.

  - A double-free was found in the way 389-ds-base handles virtual attributes context in persistent searches.
    An attacker could send a series of search requests, forcing the server to behave unexpectedly, and crash.
    (CVE-2021-4091)

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

The remote Debian 10 host has packages installed that are affected by multiple vulnerabilities as referenced in the dla-3399 advisory.

    - -------------------------------------------------------------------------     Debian LTS Advisory DLA-3399-1                debian-lts@lists.debian.org     https://www.debian.org/lts/security/                         Anton Gladky     April 24, 2023                                https://wiki.debian.org/LTS
    - -------------------------------------------------------------------------

    Package        : 389-ds-base     Version        : 1.4.0.21-1+deb10u1     CVE ID         : CVE-2019-3883 CVE-2019-10224 CVE-2019-14824 CVE-2021-3514                      CVE-2021-3652 CVE-2021-4091 CVE-2022-0918 CVE-2022-0996                      CVE-2022-2850

    Multiple security issues were discovered in 389-ds-base: an open source LDAP     server for Linux.

    CVE-2019-3883

        SSL/TLS requests do not enforce ioblocktimeout limit, leading to DoS         vulnerability by hanging all workers with hanging LDAP requests.

    CVE-2019-10224

        The vulnerability may disclose sensitive information, such as the Directory         Manager password, when the dscreate and dsconf commands are executed in         verbose mode. An attacker who can view the screen or capture the terminal         standard error output can exploit thisvulnerability to obtain confidential information.

    CVE-2019-14824

        The 'deref' plugin of 389-ds-base has a vulnerability that enables it to         disclose attribute values using the 'search' permission. In certain setups,         an authenticated attacker can exploit this flaw to access confidential         attributes, including password hashes.

    CVE-2021-3514

        If a sync_repl client is used, an authenticated attacker can trigger a crash         by exploiting a specially crafted query that leads to a NULL pointer         dereference.

    CVE-2021-3652

        Importing an asterisk as password hashes enables successful authentication         with any password, allowing attackers to access accounts with disabled         passwords.

    CVE-2021-4091

        A double free was found in the way 389-ds-base handles virtual attributes         context in persistent searches. An attacker could send a series of search         requests, forcing the server to behave unexpectedly, and crash.

    CVE-2022-0918

        An unauthenticated attacker with network access to the LDAP port can cause a         denial of service. The denial of service is triggered by a single message         sent over a TCP connection, no bind or other authentication is required. The         message triggers a segmentation fault that results in slapd crashing.

    CVE-2022-0996

        Expired password was still allowed to access the database. A user whose         password was expired was still allowed to access the database as if the         password was not expired.  Once a password is expired, and grace logins         have been used up, the account is basically supposed to be locked out and         should not be allowed to perform any privileged action.

    CVE-2022-2850

        The vulnerability in content synchronization plugin enables an authenticated attacker to trigger a     denial of service via a crafted query through a NULL         pointer dereference.

    For Debian 10 buster, these problems have been fixed in version     1.4.0.21-1+deb10u1.

    We recommend that you upgrade your 389-ds-base packages.

    For the detailed security status of 389-ds-base please refer to     its security tracker page at:
    https://security-tracker.debian.org/tracker/389-ds-base

    Further information about Debian LTS security advisories, how to apply     these updates to your system and frequently asked questions can be     found at: https://wiki.debian.org/LTS

Tenable has extracted the preceding description block directly from the Debian security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The version of 389-ds-base installed on the remote host is prior to 1.3.10.2-16.69. It is, therefore, affected by a vulnerability as referenced in the ALAS-2022-1629 advisory.

    A double free was found in the way 389-ds-base handles virtual attributes context in persistent searches.
    An attacker could send a series of search requests, forcing the server to behave unexpectedly, and crash.
    (CVE-2021-4091)

Tenable has extracted the preceding description block directly from the tested product security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

The version of 389-ds-base installed on the remote host is prior to 1.3.10.2-16. It is, therefore, affected by multiple vulnerabilities as referenced in the ALAS2-2022-1819 advisory.

    A double free was found in the way 389-ds-base handles virtual attributes context in persistent searches.
    An attacker could send a series of search requests, forcing the server to behave unexpectedly, and crash.
    (CVE-2021-4091)

    A vulnerability was found in the 389 Directory Server that allows an unauthenticated attacker with network     access to the LDAP port to cause a denial of service. The denial of service is triggered by a single     message sent over a TCP connection. No bind or other authentication is required. This message triggers a     segmentation fault that results in slapd crashing. (CVE-2022-0918)

    A vulnerability was found in the 389 Directory Server. This issue allows expired passwords to access the     database, causing improper authentication. (CVE-2022-0996)

Tenable has extracted the preceding description block directly from the tested product security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote SUSE Linux SLES15 / SLES_SAP15 host has packages installed that are affected by multiple vulnerabilities as referenced in the SUSE-SU-2022:2295-1 advisory.

  - A double-free was found in the way 389-ds-base handles virtual attributes context in persistent searches.
    An attacker could send a series of search requests, forcing the server to behave unexpectedly, and crash.
    (CVE-2021-4091)

  - An access control bypass vulnerability found in 389-ds-base. That mishandling of the filter that would     yield incorrect results, but as that has progressed, can be determined that it actually is an access     control bypass. This may allow any remote unauthenticated user to issue a filter that allows searching for     database items they do not have access to, including but not limited to potentially userPassword hashes     and other sensitive data. (CVE-2022-1949)

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote SUSE Linux SLES15 / SLES_SAP15 host has packages installed that are affected by multiple vulnerabilities as referenced in the SUSE-SU-2022:2163-1 advisory.

  - A flaw was found in 389-ds-base. If an asterisk is imported as password hashes, either accidentally or     maliciously, then instead of being inactive, any password will successfully match during authentication.
    This flaw allows an attacker to successfully authenticate as a user whose password was disabled.
    (CVE-2021-3652)

  - A double-free was found in the way 389-ds-base handles virtual attributes context in persistent searches.
    An attacker could send a series of search requests, forcing the server to behave unexpectedly, and crash.
    (CVE-2021-4091)

  - A vulnerability was discovered in the 389 Directory Server that allows an unauthenticated attacker with     network access to the LDAP port to cause a denial of service. The denial of service is triggered by a     single message sent over a TCP connection, no bind or other authentication is required. The message     triggers a segmentation fault that results in slapd crashing. (CVE-2022-0918)

  - A vulnerability was found in the 389 Directory Server that allows expired passwords to access the database     to cause improper authentication. (CVE-2022-0996)

  - An access control bypass vulnerability found in 389-ds-base. That mishandling of the filter that would     yield incorrect results, but as that has progressed, can be determined that it actually is an access     control bypass. This may allow any remote unauthenticated user to issue a filter that allows searching for     database items they do not have access to, including but not limited to potentially userPassword hashes     and other sensitive data. (CVE-2022-1949)

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote SUSE Linux SLES15 / SLES_SAP15 host has packages installed that are affected by multiple vulnerabilities as referenced in the SUSE-SU-2022:2105-1 advisory.

  - A double-free was found in the way 389-ds-base handles virtual attributes context in persistent searches.
    An attacker could send a series of search requests, forcing the server to behave unexpectedly, and crash.
    (CVE-2021-4091)

  - An access control bypass vulnerability found in 389-ds-base. That mishandling of the filter that would     yield incorrect results, but as that has progressed, can be determined that it actually is an access     control bypass. This may allow any remote unauthenticated user to issue a filter that allows searching for     database items they do not have access to, including but not limited to potentially userPassword hashes     and other sensitive data. (CVE-2022-1949)

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote SUSE Linux SLES15 / SLES_SAP15 host has packages installed that are affected by multiple vulnerabilities as referenced in the SUSE-SU-2022:2109-1 advisory.

  - A flaw was found in 389-ds-base. If an asterisk is imported as password hashes, either accidentally or     maliciously, then instead of being inactive, any password will successfully match during authentication.
    This flaw allows an attacker to successfully authenticate as a user whose password was disabled.
    (CVE-2021-3652)

  - A double-free was found in the way 389-ds-base handles virtual attributes context in persistent searches.
    An attacker could send a series of search requests, forcing the server to behave unexpectedly, and crash.
    (CVE-2021-4091)

  - An access control bypass vulnerability found in 389-ds-base. That mishandling of the filter that would     yield incorrect results, but as that has progressed, can be determined that it actually is an access     control bypass. This may allow any remote unauthenticated user to issue a filter that allows searching for     database items they do not have access to, including but not limited to potentially userPassword hashes     and other sensitive data. (CVE-2022-1949)

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote SUSE Linux SLES15 / SLES_SAP15 host has packages installed that are affected by multiple vulnerabilities as referenced in the SUSE-SU-2022:2081-1 advisory.

  - A double-free was found in the way 389-ds-base handles virtual attributes context in persistent searches.
    An attacker could send a series of search requests, forcing the server to behave unexpectedly, and crash.
    (CVE-2021-4091)

  - An access control bypass vulnerability found in 389-ds-base. That mishandling of the filter that would     yield incorrect results, but as that has progressed, can be determined that it actually is an access     control bypass. This may allow any remote unauthenticated user to issue a filter that allows searching for     database items they do not have access to, including but not limited to potentially userPassword hashes     and other sensitive data. (CVE-2022-1949)

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote Redhat Enterprise Linux 8 host has packages installed that are affected by a vulnerability as referenced in the RHSA-2022:1410 advisory.

    389 Directory Server is an LDAP version 3 (LDAPv3) compliant server. The base packages include the     Lightweight Directory Access Protocol (LDAP) server and command-line utilities for server administration.

    Security Fix(es):

    * 389-ds-base: double free of the virtual attribute context in persistent search (CVE-2021-4091)

    For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and     other related information, refer to the CVE page(s) listed in the References section.

    Bug Fix(es):

    * DB corruption _entryrdn_insert_key - Same DN (dn: nsuniqueid=ffffffff-ffffffff-ffffffff-     ffffffff,<SUFFIX>) is already in the entryrdn file (BZ#2066800)

    * IPA server (389ds) is very slow in execution of some searches (`&(memberOf=...)(objectClass=ipaHost)` in     particular) (BZ#2066801)

    * monitor displays wrong date for connection (BZ#2066848)

Tenable has extracted the preceding description block directly from the Red Hat Enterprise Linux security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

The remote Oracle Linux 8 host has packages installed that are affected by a vulnerability as referenced in the ELSA-2022-0889 advisory.

    [1.4.3.23-14]
    - Bump version to 1.4.3.23-14
    - Resolves: Bug 2059893 - Paged search lookthroughlimit counter doesnt take read ahead into account
    - Resolves: Bug 2060106 - Based on 1944494 (RFC 4530 entryUUID attribute) - plugin entryuuid failing
    - Resolves: Bug 2060110 - double-free of the virtual attribute context in persistent search

    [1.4.3.23-13]
    - Bump version to 1.4.3.23-13
    - Resolves: Bug 2056488 - Paged search lookthroughlimit counter doesnt take read ahead into account
    - Resolves: Bug 2047166 - Based on 1944494 (RFC 4530 entryUUID attribute) - plugin entryuuid failing
    - Resolves: Bug 2056481 - double-free of the virtual attribute context in persistent search

Tenable has extracted the preceding description block directly from the Oracle Linux security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

The remote Redhat Enterprise Linux 8 host has packages installed that are affected by a vulnerability as referenced in the RHSA-2022:0889 advisory.

    389 Directory Server is an LDAP version 3 (LDAPv3) compliant server. The base packages include the     Lightweight Directory Access Protocol (LDAP) server and command-line utilities for server administration.

    Security Fix(es):

    * 389-ds-base: double free of the virtual attribute context in persistent search (CVE-2021-4091)

    For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and     other related information, refer to the CVE page(s) listed in the References section.

    Bug Fix(es):

    * Paged search lookthroughlimit counter doesnt take read ahead into account (BZ#2059893)

    * Based on 1944494 (RFC 4530 entryUUID attribute) - plugin entryuuid failing (BZ#2060106)

Tenable has extracted the preceding description block directly from the Red Hat Enterprise Linux security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

The remote CentOS Linux 7 host has packages installed that are affected by a vulnerability as referenced in the RHSA-2022:0628 advisory.

  - A double-free was found in the way 389-ds-base handles virtual attributes context in persistent searches.
    An attacker could send a series of search requests, forcing the server to behave unexpectedly, and crash.
    (CVE-2021-4091)

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

The remote Scientific Linux 7 host has packages installed that are affected by a vulnerability as referenced in the SLSA-2022:0628-1 advisory.

  - 389-ds-base: double-free of the virtual attribute context in persistent search (CVE-2021-4091)

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

The remote Oracle Linux 7 host has packages installed that are affected by a vulnerability as referenced in the ELSA-2022-0628 advisory.

    [1.3.10.2-15]
    - Bump version to 1.3.10.2-15
    - Resolves: Bug 2049812 - Fix csn generator to limit time skew drift
    - Resolves: Bug 2048530 - CVE-2021-4091 389-ds-base: double-free of the virtual attribute context in     persistent search

Tenable has extracted the preceding description block directly from the Oracle Linux security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

The remote Redhat Enterprise Linux 7 host has packages installed that are affected by a vulnerability as referenced in the RHSA-2022:0628 advisory.

    389 Directory Server is an LDAP version 3 (LDAPv3) compliant server. The base packages include the     Lightweight Directory Access Protocol (LDAP) server and command-line utilities for server administration.

    Security Fix(es):

    * 389-ds-base: double-free of the virtual attribute context in persistent search (CVE-2021-4091)

    For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and     other related information, refer to the CVE page(s) listed in the References section.

    Bug Fix(es):

    * CSN generator can adjust wrongly the local and remote offsets used to generate a CSN (BZ#2049812)

Tenable has extracted the preceding description block directly from the Red Hat Enterprise Linux security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

ID	Name	Product	Family	Severity
253100	Linux Distros Unpatched Vulnerability : CVE-2021-4091	Nessus	Misc.	high
236686	Alibaba Cloud Linux 3 : 0020: 389-ds:1.4 (ALINUX3-SA-2022:0020)	Nessus	Alibaba Cloud Linux Local Security Checks	high
214393	Debian dla-4021 : 389-ds - security update	Nessus	Debian Local Security Checks	medium
194281	RHEL 8 : redhat-ds:11.3 (RHSA-2022:0952)	Nessus	Red Hat Local Security Checks	high
184658	Rocky Linux 8 : 389-ds:1.4 (RLSA-2022:0889)	Nessus	Rocky Linux Local Security Checks	high
174722	Debian dla-3399 : 389-ds - security update	Nessus	Debian Local Security Checks	medium
164356	Amazon Linux AMI : 389-ds-base (ALAS-2022-1629)	Nessus	Amazon Linux Local Security Checks	high
163317	Amazon Linux 2 : 389-ds-base (ALAS-2022-1819)	Nessus	Amazon Linux Local Security Checks	medium
162936	SUSE SLES15 Security Update : 389-ds (SUSE-SU-2022:2295-1)	Nessus	SuSE Local Security Checks	high
162523	SUSE SLES15 Security Update : 389-ds (SUSE-SU-2022:2163-1)	Nessus	SuSE Local Security Checks	high
162389	SUSE SLES15 Security Update : 389-ds (SUSE-SU-2022:2105-1)	Nessus	SuSE Local Security Checks	high
162386	SUSE SLES15 Security Update : 389-ds (SUSE-SU-2022:2109-1)	Nessus	SuSE Local Security Checks	high
162238	SUSE SLES15 Security Update : 389-ds (SUSE-SU-2022:2081-1)	Nessus	SuSE Local Security Checks	high
159912	RHEL 8 : 389-ds:1.4 (RHSA-2022:1410)	Nessus	Red Hat Local Security Checks	high
158959	Oracle Linux 8 : 389-ds:1.4 (ELSA-2022-0889)	Nessus	Oracle Linux Local Security Checks	high
158948	RHEL 8 : 389-ds:1.4 (RHSA-2022:0889)	Nessus	Red Hat Local Security Checks	high
158444	CentOS 7 : 389-ds-base (RHSA-2022:0628)	Nessus	CentOS Local Security Checks	high
158329	Scientific Linux Security Update : 389-ds-base on SL7.x x86_64 (2022:0628)	Nessus	Scientific Linux Local Security Checks	high
158267	Oracle Linux 7 : 389-ds-base (ELSA-2022-0628)	Nessus	Oracle Linux Local Security Checks	high
158262	RHEL 7 : 389-ds-base (RHSA-2022:0628)	Nessus	Red Hat Local Security Checks	high

Detections

Analytics

CVE-2021-4091

high

Tenable Plugins

high

high

medium

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medium

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medium

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